EELS, XPS and IR study of C60·2S8 compound

Shul’ga, Yu. M.; Rubtsov, V. I.; Василец, В. Н.; Лобач, А. С.; Spitsyna, N. G.; Yagubskiǐ, É. B.

doi:10.1016/0379-6779(94)02887-5

Cited by 45 publications

(23 citation statements)

References 11 publications

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“…The TEM image shows that the Au clusters wered ispersed on the AC surface, and the size of the clusters was approximately 1.6 nm ( Figure 2a), consistentw ith the size of free Au 38 (PET) 24 clusters ( Figure S2). The S2 pB Ew as found to be 163.66 eV (164.0 eV for zero-valent S [13] and 162.30 eV for C 12 H 25 SH/Au [14] ), suggesting that the sulfur is negatively charged (S dÀ ). Au 38 /AC-120 was further analyzed by X-ray photoelectron spectroscopy (XPS),a ss hown in Figure 2b.T he binding energies( BEs) of Au 4f 7/2 and 4f 5/2 were observed to be 84.18 and 97.89 eV,r espectively.T he Au 4f 7/2 value is higher than for zero-valent Au foil [12] (Au 4f 7/2 BE = 83.8 eV) and slightly lower than for Au + species (Au 4f 7/2 BE = 84.4 eV), indicatingt hat the Au species in Au 38 /AC-120a re predominately cationic Au d + (0 < d < 1).…”

Section: Resultsmentioning

confidence: 95%

“…Au 38 /AC-120 was further analyzed by X-ray photoelectron spectroscopy (XPS),a ss hown in Figure 2b.T he binding energies( BEs) of Au 4f 7/2 and 4f 5/2 were observed to be 84.18 and 97.89 eV,r espectively.T he Au 4f 7/2 value is higher than for zero-valent Au foil [12] (Au 4f 7/2 BE = 83.8 eV) and slightly lower than for Au + species (Au 4f 7/2 BE = 84.4 eV), indicatingt hat the Au species in Au 38 /AC-120a re predominately cationic Au d + (0 < d < 1). The S2 pB Ew as found to be 163.66 eV (164.0 eV for zero-valent S [13] and 162.30 eV for C 12 H 25 SH/Au [14] ), suggesting that the sulfur is negatively charged (S dÀ ).…”

Section: Resultsmentioning

confidence: 95%

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Efficient Aerobic Oxidation of Glucose to Gluconic Acid over Activated Carbon‐Supported Gold Clusters

et al. 2017

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The catalytic performance of the atomically precise gold cluster-Au (PET) (PET=2-phenylethanethiolate), immobilized on activated carbon (AC), was investigated for the aerobic oxidation of glucose to gluconic acid. The Au (PET) /AC-120 catalysts, annealed at 120 °C in air, exhibited high catalytic activity and significantly better performance than the corresponding catalysts Au /AC-150 and Au /AC-300 (treated at 150 and 300 °C to remove the protecting thiolate ligands). The high activity of the robust Au cluster was a result of the partial ligand removal, providing catalytically active sites, which were evidenced by TEM, X-ray photoelectron spectroscopy, thermogravimetric analysis, and Fourier-transform IR spectroscopy. Au (PET) /AC-120 also showed excellent recyclability (up to seven cycles). The turnover frequency for the Au (PET) /AC-120 catalyst was 5440 h , which is higher than for the Pd/AC, Pd-Bi/AC, and Au/AC under identical reaction conditions. This new ultra-small gold nanomaterial is expected to find wide application in other catalytic oxidations.

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Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 95%

Efficient Aerobic Oxidation of Glucose to Gluconic Acid over Activated Carbon‐Supported Gold Clusters

et al. 2017

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“…Meanwhile, S2 species indicated by a fit at 163.8 eV and 165.0 eV represents S 2p 3/2 and S 2p 1/2 for thiol functional group [59]. Although the binding energy (S 2p) of elemental sulfur or S 8 is within the same range, around 164.0 eV [60], the high experimental temperature (473 K) helps rule out their existence in these studies [33]. S3 species with spectral signatures at 169.0 eV and 170.2 eV likely originate from a combination of S 2p 3/2 and S 2p 1/2 features of Sn(SO 4 ) 2 and C—O—S as mentioned before.…”

Section: Resultsmentioning

confidence: 99%

Investigation of the H2S poisoning process for sensing composite material based on carbon nanotubes and metal oxides

Duan

Pirolli

Teplyakov

2016

Sensors and Actuators B: Chemical

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The poisoning of H2S sensing material based on the mixture of acid-treated carbon nanotubes, CuO and SnO2 was investigated by exposing the material to high doses of H2S (1% in volume) and following the changes spectroscopically. The presence of metal sulfides (CuS and SnS2), sulfates and thiols was confirmed on the surface of this material as the result of H2S poisoning. Further study revealed that leaving this material in air for extended period of time led to reoxidation of metal sulfides back to metal oxides. The formation of thiols and sulfates directly on carbon nanotubes is not reversible under these conditions; however, the extent of the overall surface reaction in this case is substantially lower than that for the composite material.

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“…4c). The catalysts derived from copper sulphate displayed a peak at 169.2 eV, indicative of sulphate species (bulk sulphur has a binding energy of 164.0 eV) [66]. It should be noted that the in-situ PXRD experiments (Fig.…”

Section: Scanning Transmission Electron Microscopy (Stem)mentioning

confidence: 95%

The effect of metal precursor on copper phase dispersion and nanoparticle formation for the catalytic transformations of furfural

Islam

Mesa

Osatiashtiani

et al. 2020

Applied Catalysis B: Environmental

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EELS, XPS and IR study of C60·2S8 compound

Cited by 45 publications

References 11 publications

Efficient Aerobic Oxidation of Glucose to Gluconic Acid over Activated Carbon‐Supported Gold Clusters

Efficient Aerobic Oxidation of Glucose to Gluconic Acid over Activated Carbon‐Supported Gold Clusters

Investigation of the H2S poisoning process for sensing composite material based on carbon nanotubes and metal oxides

The effect of metal precursor on copper phase dispersion and nanoparticle formation for the catalytic transformations of furfural

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